The idle air control valve (IACV) is a device attached to the throttle body that helps keep the engine of a vehicle running without throttle input, such as when the car is idling in traffic or parked ...

CARS.COM — A clean engine compartment makes a used car look newer and better maintained. Some shops that perform engine cleaning services claim a clean engine even runs a little cooler because ...

So your daily driver hot rod has an engine that runs good but looks like a horror-film reject. What do you do? Well, you could bolt the hood shut and drive the beast until it dies, or you could spend ...